| Computer Code: |
ERCL |
Preferred Map Code: |
notEntered |
| Status Code: |
Index Level |
| Age range: |
Ediacaran Period (AD)
— Ediacaran Period (AD) |
| Lithological Description: |
Granophyric granite. |
| Definition of Lower Boundary: |
Unknown. |
| Definition of Upper Boundary: |
Not applicable: unconformably overlain by Lower Cambrian sandstones. |
| Thickness: |
Unknown. |
| Geographical Limits: |
Shropshire, Welsh Borders. |
| Parent Unit: |
Uriconian Group (UO)
|
| Previous Name(s): |
none recorded or not applicable
|
| Alternative Name(s): |
The Ercall Igneous Intrusion
|
| Stratotypes: |
| Partial Type Section |
Ercall Quarries, 2km northeast of the Wrekin and south of Wellington near Telford. Toghill, P and Beale, S. 1994. |
| Reference Section |
Disused, overgrown quarries east of road from Buckatree Hall to Wellington. |
| Reference(s): |
| Wright, A E, Fairchild, I J, Moseley, F and Downie, C. 1993. The Lower Cambrian Wrekin Quartzite and the age of its unconformity on the Ercall Granophyre. Geological Magazine, Vol.130, 257-264. |
| Pocock R W, Whitehead T H, Wedd C B and Robertson T. 1938. Shrewsbury District including the Hanwood Coalfield. Memoir of the Geological Survey of Great Britain, England and Wales. (London: H.M.S.O.). |
| Thorpe, R S, 1974. Aspects of magmatism and plate tectonics in the Precambrian of England and Wales. Geological Journal, Vol.9, 115-136. |
| Toghill, P and Beale, S. 1994. Ercall quarries, Wrekin area, Shropshire: Geology teaching trail. Geologists' Association Guide, No.48. [London: Geologists' Association.] |
| Wilson, D, 2000. Shropshire. 81-113 in Precambrian rocks of England and Wales. Carney, J N (editor). Geological Conservation Review Series No. 20. (Peterborough: Joint Nature Conservation Committee). |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
|
E152
|
